<?php

function quick_encrypt($string, $key) {
    $result = '';
    for($i=0; $i<strlen($string); $i++) {
            $char = substr($string, $i, 1);
            $keychar = substr($key, ($i % strlen($key))-1, 1);
            $char = chr(ord($char)+ord($keychar));
            $result.=$char;
    }      
    return base64_encode($result);
}

function quick_decrypt($string, $key) {
    $result = '';
    $string = base64_decode($string);

    for($i=0; $i<strlen($string); $i++) {
            $char = substr($string, $i, 1);
            $keychar = substr($key, ($i % strlen($key))-1, 1);
            $char = chr(ord($char)-ord($keychar));
            $result.=$char;
    }
    return $result;
}
        
?>

